I recently bought a CM20 and had used it on a test track since my old layout has been dismantled and the new one is not ready yet. However, when I wired it into the new layout tonight, I noticed for the first time that there is no fixed DC connection. I need the fixed DC for my turntable, several pilot lights, and some motorized accessories. Do I have to use a separate power pack for these? Or am I missing something?